Following on from the suuccessful Thinking With Theory in Qualitative Research, this new book by Mazzei and Jackson explores how qualitative inquiry can be truly methodologically innovative through framing research ontologically. Rather than treating concepts as waiting to be extracted from the empirical field, the book experiments with concepts, mapping their ontogenetic and generative properties, and showing that they can be generative of new realities a fundamental shift from worldviews to different worldings.